diff --git a/panda/src/express/config_express.N b/panda/src/express/config_express.N
index 823d65541e..ad6e244b4e 100644
--- a/panda/src/express/config_express.N
+++ b/panda/src/express/config_express.N
@@ -21,6 +21,7 @@ forcetype OFileStream
 forcetype FileStream
 forcetype IDecryptStream
 forcetype OEncryptStream
+forcetype LineStream
 
 forcetype ofstream
 forcetype ifstream
diff --git a/panda/src/express/config_express.h b/panda/src/express/config_express.h
index 06203eff08..863c0f60f5 100644
--- a/panda/src/express/config_express.h
+++ b/panda/src/express/config_express.h
@@ -25,8 +25,9 @@
 #include "configVariableList.h"
 #include "configVariableFilename.h"
 
-// Include this so interrogate can find it.
+// Include these so interrogate can find them.
 #include "executionEnvironment.h"
+#include "lineStream.h"
 
 #ifdef ANDROID
 #include <jni.h>